jQuery 中数组 求和

[wzballa]

jQuery 中数组，Json 格式为 [{"id":"1","amount":"2"},
{"id":"2","amount":"2"},
{"id":"1","amount":"4"}]
我想得到id为1的总和，id为2的总和

[scscms太阳光]

var json=[{"id":"1","amount":"2"},
        {"id":"2","amount":"2"},
        {"id":"1","amount":"4"}];
function getV(id){
    var n=0;
    for(var i=0;i<json.length;i++){
        if(json[i].id==id){
            n+=parseInt(json[i].amount);
        }
    }
    return n;
}
    alert(getV(1));
    alert(getV(2));

[猿敲月下码]

<script type="text/javascript">
var arr = [
	{"id":"1","amount":"2"},
	{"id":"2","amount":"2"},
	{"id":"1","amount":"4"}
];
// 存放结果
var ReustMap = {};

for(var i = 0,len=arr.length;i<len;i++) {
	var item = arr[i];
	ReustMap[item.id] = (parseInt(ReustMap[item.id] || 0)) + parseInt(item.amount)
}

alert(ReustMap[1]); // id=1的总和
alert(ReustMap[2]); // id=2的总和
</script>

[licip]

上面的答案可以吧。

[风一样的大叔]

楼主可以结贴了